Air flow management for cooking system
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Solution Overview
Problem
Current recirculating cooking ventilation systems face challenges such as difficult-to-clean internal components, noise from high-speed fans, and high installation costs due to the need for structural modifications.
Innovation Solution
The proposed solution includes a recirculating ventilation system with removable and dishwasher-safe components, such as grease filters and inlet apertures, to facilitate cleaning. Additionally, the system incorporates noise-reducing features like radiused internal corners and acoustic dampening structures, and utilizes ozone reduction catalysts and UV treatment systems to improve air quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ventilation systems vent to exterior, then cooking byproducts are removed effectively, but installation cost increases and structural modifications are required
Solution Approach 1:
The patent extracts the ventilation function from the traditional exterior-venting system and implements it as a self-contained recirculating unit. The ventilation system processes and recirculates air within the cooking environment, eliminating the need for exterior venting infrastructure while maintaining byproduct removal effectiveness through filtration and treatment components.
Solution Approach 2:
The patent introduces intermediary components such as filters, ozone generators, and catalytic converters that mediate between the cooking byproducts and the recirculated air. These intermediaries enable effective byproduct removal through chemical and physical treatment processes, allowing the system to achieve exterior-venting-level performance without structural modifications.
2Productivity
If high-speed fans are used, then air circulation efficiency improves, but noise level increases
Solution Approach 1:
The patent employs radiused internal corners and curved airflow paths within the ventilation system. These curved geometries reduce turbulence and eddy currents that generate noise, allowing the system to maintain high air circulation efficiency with lower noise levels compared to sharp-angled duct designs.
Solution Approach 2:
The patent introduces acoustic dampening structures and noise-absorbing materials as intermediary elements within the ventilation system. These intermediaries absorb and dissipate sound waves generated by fan operation, reducing noise propagation while maintaining effective air circulation.
3Ease of operation
If internal components are made removable, then ease of cleaning improves, but device complexity increases
Solution Approach 1:
The patent segments the ventilation system into modular components including removable filters, washable duct sections, and detachable treatment elements. This segmentation enables easy cleaning and maintenance of individual components without disassembling the entire system, while the modular design actually simplifies the overall device complexity through standardized interfaces and assembly.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively addresses cleaning difficulties, reduces noise, and lowers installation costs by providing accessible and easy-to-maintain components, while also enhancing air quality through efficient grease and particulate removal.
Implementation Method 1
introducing ozone into the ventilation duct to oxidize one or more of grease and particulate matter in the cooking exhaust
Implementation Method 2
reducing ozone in the ventilation duct via an ozone reduction catalyst
Data Source
AI summary
Examples are disclosed that relate to recirculating ventilation systems for cooking appliances. One example provides a cooking appliance ventilation system, comprising a ventilation duct comprising an inlet aperture configured to receive cooking exhaust, a fan configured to pull the cooking exhaust through the inlet aperture and the ventilation duct, an ozone source configured to introduce ozone into the ventilation duct; and one more ozone mitigation components positioned within the ventilation duct downstream of the ozone source.